Underdosing of other narcotics, sequela

This code indicates a patient is experiencing a long-term or residual effect from having previously received an insufficient amount of a narcotic medication other than opium, heroin, or other specified opioids. These sequelae are the lasting consequences of the underdosing event, not the acute underdosing itself.

Apply this code when documenting chronic conditions or persistent symptoms directly attributable to a past underdosing of a narcotic, such as prolonged pain due to inadequate analgesic management. This code is appropriate for situations where the underdosing event is no longer active but its effects continue to impact the patient's health.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current condition to a historical underdosing of a narcotic.
• Do not use this code for acute underdosing; instead, use the appropriate acute underdosing code with an "A" or "D" seventh character.